Simple JS object safe property accessor function

safeGet.js

function safeGet(obj, props, defaultValue) {
  if (typeof props === 'string') {
    props = props.split('.');
  }
  function safeGetByArray(obj, propsArray, defaultValue) {
    if (obj === undefined || obj === null) {
      return defaultValue;
    }
    if (propsArray.length === 0) {
      return obj;
    }
    return safeGetByArray(
      obj[propsArray[0]],
      propsArray.slice(1),
      defaultValue
    );
  }
  return safeGetByArray(obj, props, defaultValue);
}